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Elena L [17]
3 years ago
8

When the sum of an unknown number and twenty two is divided by the unknown number, the quotient is 12. What is the unknown numbe

r?
Mathematics
1 answer:
Gnom [1K]3 years ago
8 0
You would basically work backwards and do inverse operations




12
24*
__
288



288/24= 12
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What is the center of (x+5)^{2}+(y-4)^{2}=121?
Inessa [10]

Answer: (-5,4)

Step-by-step explanation:

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3 years ago
Consider the ODE, dy dx = y 2 1 + x (2) subject to condition y = 1 when x = 0, use your Euler code from class (modified if neces
makkiz [27]

Answer:

Computation.

Step-by-step explanation:

I'm not really sure if that's the analytical solution of the inital value problem,

because y(0)=11-ln(1-0)(3)=11. Howevwer, let us procede with the given values...

Let us assume that we are going to use euler with n=2 (two steps) and h=0.2(the size of each step)

The update rules of the Euler Methode are

X_i = X_{i-1}+h=X_0+ih

m_i=\dfrac{dY}{dX} \biggr \rvert_{x_i} \\\\Y_{i+1}=m_i\cdot h+y_i

Since the initial value problem tells us that Y=1 when X=0, we know that

X_0=0 and that Y_0=1. Then, we have

X_0=0\\\\X_1=0.2\\\\X_2=0.4

and

Y_0=1\\\\m_0=21 \cdot Y_0 + X_0 \cdot 2=21 \cdot 1 + 0=21\\\\Y_1=0.2 \cdot 21 + 1 =5.2\\\\m_1=21 \cdot Y_1 + X_1\cdot 2=21 \cdot 5.2 + 0.2 \cdot 2=109.6\\ \\Y_2=m_1 \cdot h + Y_1 = 109.6 \cdot 0.2 + 5.2= 27.12

which gives us the points (0,1), (0.2, 5.2) and (0.4, 27.12).

Now, since we want to compare the analyticaland the Euler result, we first compute the value of y=11-ln(1-x)(3) for the values x=0, 0.2 and 0.4. We get that

y(0)=11-\ln(1-0)(3)=11-ln(1)(3)=11\\\\Y(1)=11-\ln(1-0.2)(3)=11.67\\\\Y(2)=11-\ln(1-0.4)(3)=12.53

and we compute Y(i)-Y_i for each i.

It holds

Y(0)-Y_0=11-1=10\\\\Y(1)-Y_1=11.67-5.2=6.47\\\\Y(2)-Y_2=12.53-27.12=-14.59

which tells us that we have a really bad approximation, as I already stated there must be a mistake in the analytical solution since the intial values don't coincide. Also note that the curve that we get using the euler methose is growing faster than the analitical solution.

4 0
3 years ago
Please select the word from the list that best fits the definition
Ann [662]

Answer:

-line graph

Step-by-step explanation:

We are going to take the definition of all the terms and then deduced our correct answer.

<u>Pictograph</u> : Pictograph also known as pictogram uses picture to represent data.

<u>Pie graph</u>: It is a chat that uses pie slices to represent relative size of data.

<u><em>Line graph:</em></u> A line graph is a graph with points connected by lines to show changes in value  over time.

<u>Bar graph</u>: A bar graph uses rectangular box known as bars to represent data, it is relatively used to show size

<u>Double bar graph</u> : A double bar graph uses two bars beside each other two represent data. It can be used to compare two data groups.

From the above definition, we can deduced that the word that shows data over time is the line graph  

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Answer:

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Step-by-step explanation:

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Since all the sides are equal then the volume is:

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3 years ago
Which would not be a step in solving 18=2(4+ x)
mr_godi [17]

Answer:

B

Step-by-step explanation:

Done on apex

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3 years ago
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